Feeding mechanism for book-sewing machines



u. BISCHOF FEEDING MECHANISM FOR BOOK SEWING IACHQINBQ' Jan.

5 Shee ts-Sheet 1 Filed Dec. 13, 1920 Jan. 19,1926.

' u BISCHOF FEEDING MECHANISM FOR BOOK SEWING MACHrNES Filed Dec. 13,1920 5 Sheets-Sheet 2 v, Z22/v ewl- ULB L6 @12 1.

' Jan. 19,1926. 1,569,909

. I U. BISCHOF I FEEDING MECHANISM FOR BOO K SEWING MACHINES Filed D9013, 1920 5 Sheets-Sheet 5 26 lave-m1 ZLB $50M Jan. 19 1926,

1,569,909 U. BISCHOF v FEEDING MECHANISM FOR BOOK SEWING MACHINES FiledDad. 13, 1920 5 Sheets-$heet 4 i 9 as 57 52 1 fizz'enm Patented Jan. 19,1926.

UNITED STATES PATENT OFFICE.

"ULRICH BISCHOF, OF HORGEN, SWITZERLAND, A SSIGNOR TO GEBR. STAUBLI, OFI'IORGEN, SWITZERLAND.

FEEDING MECHANISM FOR BOOK-SEWING MACHINES.

Application filed December 13, 1920.

To all whom it may concern:

Be it known that I, ULRICH BISGHOF, a citizen'of Switzerland, residingat Horgen, in the county of Zurich and State of Switzerland, haveinvented certain new and useful Improvements in Feeding Mechanism forBook-Sewing Machines, of which the following is a specification.

In book fastening machines, as is well known, the previously foldedsheets are fastened together by means of thread, and piled successivelyside by side on the book table of the machine to a pile, the said pilebeing then fed forwards through a distance equal to the thickness of asheet each time a fresh sheet is added by the table saddle to the saidtable. In this feeding movement the pile of sheets slides along the booktable. It has now been found that owing to the friction of the sheets onthe table, the lower portion of the pile sometimes moves through asmaller distance than does its upper portion, and consequently theseveral sheets in the pile gradually assume an inclined position. Theoperator has therefore to straighten the pile from time to time, forwhich purpose the machine has to be stopped in order to avoid the riskof accidents. It will be readily understoodthat this considerablydiminishes the output of the machine.

The improved apparatus forming the subject matter of this inventionobviates the above mentioned drawbacks.

The improved apparatus comprises drivers which alternately makeprogressive movements in the direction of the feed, and then makemovements oppositely thereto, but come into contact with the fastenedsheets only during their movement in the former direction. Thisexpedient causes the sheets to move forwards uniformly along the booktable.

The accompanying drawings illustrate a constructional example of the newapparatus in its application to a thread-fastening machine so far as isrequired for the under standing of the invention.

In these drawings:

Fig. l is a side elevation.

Fig. 2 is a rear elevation.

Fig. 3 is a section on the line A-B of Fig. 2, drawn to a larger scale.

ing the latter.

Serial No. 430,359.

details on a larger different positions.

On a pin 2 mounted in the frame 1 there is located a driving pulley 3 towhich is positively connected a toothed wheel 4. This wheelmeshes with atoothed wheel 5 whose shaft 7 is mounted in one end of a lever 6, andalso carries a disc 8 formed with a rib, which rib, by depressing thetreadle 9 arranged on the lever 6, can he brought into engagement with asecond grooved disc 10 for the purpose of rotat- The shaft 11 carryingthe grooved disc 10 is mounted in the frame 1,

and carries a cam 12 on which the anti-fricmounted by means of the shaft15 in an eye of the frame 1. On the shaft 16 which only is lifted andlowered by the cam 12 and the roller 13 but not turned on its own axisand which is carried by the arm 14:, there is fixed a second arm 17whose end is connected by a link 18 to the end of an arm 19. This latteris fixed in its turn to a shaft 21 that is mounted in the book table 20hereinafter referred to. y

A spring 39 fixed at one end to the machine frame and at its other endto the arm 17, has a tendency to force the arm 17 downwards, and thuspress the roller 13 against the cam 12. The shaft 21 carries by means ofarms 22 a rod 23 with links 2 1, each of has laterally projectingtappets 28, 29, having in cross section the shape of a triangle with arounded corner. Each driver bar carries a sliding pin and 31respectively situated in the path of the adjacent tappet 28 and 29respectively. The illustrated shape of the latter has the result thatwhen the drivers are moved for instance in the direction of the arrowshown in Fig. 8, that is to say, from the rear towards the front, thesliding pins 30, 31 slide at first along the tappets 28, 29 in theupward direction, and then drop down, and thus cause the correspondingdriver bars 25 to rise up over the table surface, and then fall downagain. On the return stroke of the. driver bars the sliding pins comeunder the tappets and thus cause the driver bars to move down below thetable plate. In order to effect this, slots 39* are provided in thetable plate and the driver bars rest upon flat springs 39' (Fig. 9)fixed to the underside of the table plate.

The book table 20 rests on a screw spindle guided in the frame, andcarries a screw nut having the shape of a chain wheel 3st. The spindleis connected by a chain 65 to a chain wheel 36 which together with thehand wheel 37, is located loose on the bolt 38 fixed in the frame. Bysuitably rotating the hand wheel, the book table can be adjusted in thevertical. direction. The table saddle 40 that serves to receive thefolded sheet is fixed on a shaft 4-]. mounted in the machine frame. Thesupport for the fastened sheets constitutes an angle-shaped member 43which is jointed by means of a link 42 to a slide block 4-3 that is inits turn guided in the book table 20.

The needle aparatus is located above the table saddle. This apparatusconsists of a guide bearing -14 fixed to the machine frame, and the bars46 that are guided therein and carry the needles A lever 41S mounted ona shaft l? in the machine frame, and having a forked end, engages ablock l9 pivoted to the needle bar 46. The shaft 47 receives from timeto time by known means not forming part of this invention an oscillatorymotion, whereby there is imparted to the needle bar an upand down-motionby means of which the needles are caused to pierce the sheet laid on thetable saddle.

For the purpose of stopping the machine by hand, the hereinafterdescribed disengaging apparatus is provided.

On the aforesaid shatt 15 there is pivotally mounted an arm 50 withshaft 51 on which are fixed a hand wheel 70 and a small grooved wheel52, the ribs of which engage in the large grooved wheel 10. It should betaken into consideration that the arm Ll carrying the anti-frictionroller 13 and the axle 16 is movable on the pivot 15 independently ofthe arm 50 carrying the shalt 51 with the hand wheel 70 and the groovedwheel 52, so that the roller 13 may be lifted and lowered by the cam 12while the grooved wheel 52 freely rests on the disc 10 as shown in Figs.13 and 1-l-v Tl 3 arm 5-0 carries by means of an extension, the lowerend oil? a hand lever .52 A coiled spring :33 (Fig. 3) which bears atone end against the extension of the arm 50, and with its other endagainst a set collar 52" mounted on the hand lever 52', is designed forthe purpose of allowing the hand lever :32 to be rotated only withdiiliculty in the arm 50.

The a'ioitsaid treadle lever 9 is engaged by a rod 55, (see Figs. 11 tol-l) the upper end of which is pulled by a spring :76 attached to thearm 5!). against the can; 57 located on the hand lever .32. A slotprovided in the rod 55, serves to receive a bolt 56' situated on the arm50. hen the hand lever in Fig. l. pressed to the right, the cam 57presses the rod likewise to the right, with the result that its slotcomes over the pin 4'30. The bottom of the slot (Figs. 1, ll and isslightly inclined in the downward direction in order that when the slotslides over the bolt 56, the rod :35 will be slightly raised, and thesmall grooved wheel 8 carried by the arm 6 will be moved out ofengagement with the large grooved wheel 10, so that the latter and therain 12 driven by it will come to a standstill. The operalor' is thusenabled by turning the hand lever 52 or pulling the rod 68 to stop themachine instantly. The hand wheel 70 and (he grooved wheel as connectedpositively to it, are designed (altethe machine has been stopped in themanner above described) to enable the operator by turning the hand wheelT0, to start the machine slowly by hand, as is desirable for instancefor remedying breakdowns or for removing the fastened sheets :from themachine. The slot as it slides over the bolt 56 presses down the arm 50and therewith the grooved wheel 52, so that it is iorcilily messed inthe groove of the wheel 10. In this position of the parts 52, 55 and ii?(see Fig. ll) it is absolutely impossible to press down the treadie l)and to start the machine by the grooved wheel 8. This may only beelliected when the hand lever F2 has been locked forwardly and the :am57 removed from the rod 54") (see Figs. 1 and 13).

In Fig. 13, the wheel 8 engages the wheel 10 and the machine is normallydriven. This condition is obtained by moving the lever 52 by hand fromthe position shown in Fig. ll into the position shown in Fig. 13. Thecam 57 fixed to the lever .32 is also moved in the same direction, sothat the spring pulls the rod having the slot 58 in the position shownin Fig. 1.7%. In this position the slot 58 of the rod 55 is disengagedfrom the bolt 50'. The treadle 9 is therefore free to beopi-n'atcd fordriving the machine by the motor. In this position the wheel rigidlyconnected to the hand lll l wheel 70 rests only by its own weight onthewheel 10 and is turned thereby continu ously. 1

If however it is desired to drive the machine by hand and the hand wheel70, for a short period, the lever 52 has to be moved into the positionshown by Fig. ll. When doing this,the cam 57 moves the rod to the right-(Fig. 1.4) and the slot 58 comes into engagement with the bolt 56. Dueto the cooperation of the slot 58 and the bolt 56, the rod 55 is therebyslightly lifted, so that the wheel. 8 diseng' es from the wheel 10. Ifpressure is then applied to the treadle 9 by the foot, the wheel is pr;d upon the wheel 10, which when turned by hand drives the machine.

The cam 12 rotating with the wheel 10 produces by its action upon theanti-friction roller 13 (see Figs. 13 and 14. a rocking movement of thearm 14 around its pivot 15 whereby the arm 17 is also lifted and loweredthus producing; by the rod 18 and the arm 19 a rocking movement of theshaft 21. This rocking motion bymeans of the arm 22, the rod 23 and thelinks 2%, causes the driver bars 25 to move to-andfro. As alreadystated, the driver bars move out of the machine table only in theforward stroke, and then exert a pushing; action against the basalsurface of the pile situated on the book table, so that the said pile iscaused to. move to the rear by force at top and bottom'along the booktable by the action of the blow exerted by the table saddle.

In order to cause the machine to be an tomatically disconnected when thepile has increased to the full length of the book table, the followingdescribed arrangement is employed. I

The slide block 43 is provided with a pin 59 which, in the rear-mostposition of the slide block, strikes the inc ined surface of a pawl 60,which latter is pivoted to a lever 61. that is loose 011 the shaft 21.The lever 61 is connected at its lower end by means of a spring 63 to abolt 6? situated on the stationary book table 20. The pawl in itsposition shown in Fig. 1, lies against a pin 6% of the stationary booktable, and is mounted loose on pin of the lever 61. The latter alsocarries a stop 62 for the nose 6? of the lever 66 mounted on the pin 65.The upper end of this lever 66 is connected by a rod 68 to the lever 52.Vi heinin the case of the book table being full, the pin 59 brings thepawl (3 out of engagement with the pin 641-, the lever 61 is caused bythe tension spring 63 to rock to the right, whilst the lever 66 pivotedto the lever 61, rocks to the left, with the result that the rod 68causes the hand lever 5:2 to rock to the right, and stop the machine inthe manner above described.

;rooved wheel 52 carried by the arm Further in connection withtheoperation of the machineit is to be noted that the cam l2 whenrotating lifts and lowers the antifriction roller 18 drawn to the cam 12by the spring 39 attached to the arm 17. This movement causes a rocking"movement of the arm 13% as already described and also of the arm 1%) andthe shaft 2i. The 5i) and resting on the grooved wheel ll) is turied bythe same, the shaft 51 and the hand wheel 70 being also idly turned. Thelat ter together with the wheel 52 has only the purpose to enable theoperator when the machine has been stopped to start the machine slowlyby driving the wheel 10 when it is desirable.

What I claim is 1. In a book sewing machine, the combi' nation of a booktable for receiving" a pile of fastened sheets in the upright positionwith an abutment mounted on the table for supporting; only the upperpart of the pile of fastened sheets, drivers for straightening only thelower part of the sheets, means for imparting to and fro motion to thedrivers, and means for pressing said drivers against the lower edges ofthe sheets of the pile during their movement towards the abutment, andkeeping them out of action upon the sheets in their movement in theopposite direction.

2. In a book sewing machine the combination of a book table forreceiving a pile of fastened sheets in upright position with an abutmentmounted on the table forsupporting only the upper part of the pile offastened sheets, the vertical distance be tween the surface of the tableand the abut mentbeing adjustable.

3. In a book sewing machine the combination of a book table stationaryin the horizontal direction for receiving a pile of fastened sheets inthe upright position, with an abutment, a slide block guided in the booktable, a link jointed at one end on the abutment and at the other onsaid slide block and permitting" adjustment of the vertical distancebetween the surface of the table and the abutment.

i. In a book sewing machine the combination of a book table forreceiving a pile of fastened sheets in the upright position, with arocking shaft mounted in the book table, arms located on the rockingshaft, a bar supported by these arms, drivers for straightening thelower part of the pile of fastened sheets, a series of links, each ofwhich being connected with one end on one of said arms and with theother on the end of a driver for imparting to and fro motion to thedrivers.

5. In a book sewing; machine the combination of a book table forreceiving a pile of fastened sheets in the upright position,

one direction, the pins will slide over the w tuppets and press thedrivers against the pile, and when the drivers are moved in the otherdirection, said pins will pass undernenth the tuppets and keep thedrivers out of action upon the said sheets.

In testimony whereot I have utiixed my signature.

ULRICH l3

